indefinite-integration

Question: $\int_{{}}^{{}}{\frac{\sec x\ dx}{\sqrt{\cos 2x}}}=$



1) ${{\sin }^{-1}}(\tan x)$
2) $\tan x$
3) ${{\cos }^{-1}}(\tan x)$
4) $\frac{\sin x}{\sqrt{\cos x}}$
Solution: Explanation: No Explanation
Integration by substitution

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